基于抛物线包络反演的距离选通三维成像方法

3D Range-gated Imaging Method Based on Parabolic Envelope Inversion

距离选通三维成像技术在三维测绘、远距离侦查、导航、水下目标探测等应用领域具有重要意义。介绍了距离选通超分辨率三维成像技术目前的发展现状和常用的三维反演算法。在此基础上研究了基于抛物线包络的距离选通三维成像方法。在实际测距精度、三维成像景深、实时性和系统实现的难易程度等方面,与目前常用的三角形和梯形能量相关算法进行了对比分析和实验验证。实验结果表明:基于抛物线包络的三维反演算法降低了系统硬件指标要求,提高了实际测距精度,同时实现了大景深实时三维成像的要求,具有良好的应用前景。

3 D range-gated imaging technology is of great significance in application fields such as 3 D mapping,long-distance surveillance,navigation,and underwater target detection.The development of 3 D range-gated super-resolution imaging technology and the frequently-used 3 D inversion algorithms are introduced.On this basis,the 3 D range-gated imaging method based on the parabolic envelope is studied.In terms of actual ranging accuracy,depth of field(DOF)of 3 D imaging,real-time performance and the difficulty of system implementation,the proposed method is compared with the commonly used triangle and trapezoidal energy-related algorithms and verified by experiments.The results show that the the parabolic envelope-based 3 D inversion algorithm reduces the system hardware index requirements,improves the actual ranging accuracy,and meets the demand for real-time large DOF 3 D imaging,which demonstrates its good application prospects.